Screw gun



FIG. 1 is a perspective view of a screw gun showing my new design;

FIG. 2 is a right side elevational view showing the design for the screwgun of FIG. 1;

FIG. 3 is a left side elevational view showing the design for the screwgun of FIG. 1;

FIG. 4 is a front elevational view showing the design for the screw gunof FIG. 1;

FIG. 5 is a rear elevational view showing the design for the screw gunof FIG. 1;

FIG. 6 is a top plan view showing the design for the screw gun of FIG.1; and,

FIG. 7 is a bottom plan view showing the design for the screw gun ofFIG. 1.

The broken lines shown in the drawings illustrate features of the screwgun that form no part of the claimed design.

CLAIM The ornamental design for a screw gun, as shown and described. 